<?xml version="1.0" encoding="utf-8"?>
<mx:Module 
  xmlns:mx="http://www.adobe.com/2006/mxml" 
  backgroundColor="#EEEEEE"
  borderStyle="solid"
  borderThickness="3"
  layout="vertical">
  
  <mx:Form>
  <mx:Script>
      <![CDATA[
        private function getValue( base:String, exp:String ):String
        {
          if( Number( base ) > 1 && Number( exp ) > 1 )
            return Math.pow( Number( base ), Number( exp ) ).toString();
          else
            return "invalid value";
        }
      ]]>
  </mx:Script>
  <mx:FormItem label="Base:">
    <mx:TextInput id="txtBase" />
  </mx:FormItem>
  <mx:FormItem label="Exponent:">
    <mx:TextInput id="txtExp" />
  </mx:FormItem> 
  <mx:FormItem label="Value:" fontWeight="bold">
    <mx:TextInput id="txtValue" 
      text="{ getValue( txtBase.text, txtExp.text ) }"/>
    </mx:FormItem>        
  </mx:Form>
</mx:Module>